G - Physics – 01 – L
Patent
G - Physics
01
L
G01L 9/12 (2006.01) G01L 9/00 (2006.01) G01L 13/00 (2006.01)
Patent
CA 2286779
A capacitive pressure transducer (110) includes a conductive diaphragm positioned between pneumatically separated chambers. The diaphragm is fixed and sealingly coupled at its periphery to the peripheral rim (116) of a concave body member. The diaphragm (140) is supported in tension by the peripheral rim (116) of a concave body member. An electrode assembly (150), supported by the body member (120, 130), establishes a substantially planar conductive surface opposite to and spaced apart by a nominal gap from the conductive diaphragm. The body member includes a yieldable portion that is adapted to radically expand its peripheral rim (116) in response to forces applied to the body member. When the forces are aplied, the body member becomes strained beyond its elastic limit and takes a permanent set whereby the peripheral rim (116) is expanded and the diaphragm becomes tensioned.
Transducteur (110) de pression capacitif qui comporte un diaphragme conducteur placé entre des chambres pneumatiquement séparées. Le diaphragme est fixé sur sa périphérie au bord périphérique (116) d'un corps concave et couplé de manière étanche à ce bord. Ledit diaphragme (140) est supporté en tension par ledit bord périphérique (116). Un ensemble électrode (150), porté par le corps (120, 130), définit une surface conductrice pratiquement plane située face au diaphragme conducteur et espacée de ce dernier par un écart nominal. Le corps comporte une partie élastique adaptée pour étendre radicalement son bord périphérique (116) en réponse à des forces appliquées sur le corps. Lorsque ces forces sont appliquées, le corps est contraint au-delà de sa limite élastique et subit une déformation permanente, ce qui étend le bord périphérique (116) et tend le diaphragme.
Riches Mckenzie & Herbert Llp
Setra Systems Inc.
LandOfFree
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